/* ============================================
   Markdown Editor
   ============================================ */

html { background-color: #0d9488; }
html[data-theme="dark"] { background-color: #0f172a; }

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
}

[data-theme="dark"] body {
  background: #0f172a;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ======================
   HEADER
   ====================== */

.header {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  padding: var(--space-3) 0;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.header-content { display: flex; align-items: center; gap: var(--space-4); }

.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: white;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.1);
  transition: all var(--transition-base);
  flex-shrink: 0;
}
.logo-link:hover { background: rgba(255,255,255,0.2); transform: translateY(-1px); }
.logo-text { color: white; }
.logo-dot { color: #fbbf24; animation: pulse 2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(1.2); }
}

.title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: rgba(255,255,255,0.9);
  flex: 1;
}

/* ======================
   TOOLBAR
   ====================== */

.md-toolbar {
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-2) 0;
  position: relative;
  z-index: 9;
  flex-shrink: 0;
}

.md-toolbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Tab Nav */
.tabs-nav {
  display: flex;
  gap: var(--space-1);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.tab-btn:hover { background: rgba(255,255,255,0.1); color: white; }
.tab-btn.active {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.2);
  color: white;
}

.tab-icon { font-size: var(--text-base); }

/* Toolbar Actions */
.toolbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.auto-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
}
.auto-toggle:hover { color: white; }
.auto-label { user-select: none; }

/* ======================
   PAGE BODY
   ====================== */

.page-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas: "content";
  position: relative;
  z-index: 1;
}

.ad-sidebar { display: none; align-self: flex-start; padding: var(--space-4) 0; }
.ad-sidebar-left  { grid-area: ad-left;  justify-self: center; }
.ad-sidebar-right { grid-area: ad-right; justify-self: center; }
.ad-sticky { position: sticky; top: var(--space-4); }
.ad-placeholder {
  display: flex; align-items: center; justify-content: center;
  text-align: center; width: 160px; height: 600px;
  background: rgba(255,255,255,0.08); border: 2px dashed rgba(255,255,255,0.2);
  border-radius: var(--radius-md); color: rgba(255,255,255,0.4);
  font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.05em; line-height: 1.4;
}

@media (min-width: 1400px) {
  .page-body {
    grid-template-columns: 200px 1fr 200px;
    grid-template-areas: "ad-left content ad-right";
  }
  .ad-sidebar { display: flex; justify-content: center; }
}

.main-content {
  grid-area: content;
  padding: var(--space-4) var(--space-4) var(--space-6);
  min-width: 0;
}

/* ======================
   MOBILE PANEL TABS
   ====================== */

.mobile-panel-tabs {
  display: none;
  gap: 0;
  margin-bottom: var(--space-3);
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 3px;
}

.mobile-tab {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-md) - 2px);
  color: rgba(255,255,255,0.6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.mobile-tab.active {
  background: rgba(255,255,255,0.2);
  color: white;
}

@media (max-width: 767px) {
  .mobile-panel-tabs { display: flex; }
}

/* ======================
   EDITOR WRAPPER
   ====================== */

.editor-wrapper {
  display: flex;
  gap: 1px;
  background: rgba(255,255,255,0.15); /* gap color = divider */
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 520px;
}

.editor-pane,
.preview-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-surface);
}

/* Mobile: stack panels, show only active */
@media (max-width: 767px) {
  .editor-wrapper { flex-direction: column; gap: 0; }
  .editor-pane,
  .preview-pane { min-height: 400px; }
  .editor-pane.mobile-hidden,
  .preview-pane.mobile-hidden { display: none !important; }
}

/* Pane Header */
.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-gray-50);
  flex-shrink: 0;
  min-height: 40px;
  flex-wrap: wrap;
}
[data-theme="dark"] .pane-header { background: var(--color-gray-800); }

.pane-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.pane-stats {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.stat-sep { opacity: 0.4; }

.pane-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Preview sub-tabs */
.preview-sub-tabs {
  display: flex;
  gap: 0;
  background: var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: 2px;
  flex-shrink: 0;
}
[data-theme="dark"] .preview-sub-tabs { background: var(--color-gray-700); }

.preview-tab {
  padding: 3px var(--space-3);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.preview-tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .preview-tab.active { background: var(--color-gray-600); color: var(--color-gray-100); }

/* Pane Body */
.pane-body {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.md-textarea {
  flex: 1;
  width: 100%;
  min-height: 480px;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  resize: none;
  border: none;
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
}
[data-theme="dark"] .md-textarea { background: var(--color-gray-900); color: var(--color-gray-100); }

/* Drop overlay */
.drop-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border: 2px dashed #0d9488;
  border-radius: 0;
  z-index: 5;
}
.drop-overlay.active { display: flex; }
.drop-message {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: #0d9488;
}

/* Preview Output */
.preview-output {
  flex: 1;
  min-height: 480px;
  padding: var(--space-4) var(--space-6);
  overflow-y: auto;
  background: var(--color-surface);
}

.html-source {
  flex: 1;
  min-height: 480px;
  width: 100%;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  overflow-y: auto;
  overflow-x: auto;
  white-space: pre;
  background: var(--color-surface);
  color: var(--color-text);
  margin: 0;
}
[data-theme="dark"] .html-source { background: var(--color-gray-900); color: var(--color-gray-100); }

/* ======================
   MARKDOWN BODY (Preview)
   ====================== */

.markdown-body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
  word-wrap: break-word;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-weight: var(--font-bold);
  line-height: 1.25;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--color-text);
}
.markdown-body h1 { font-size: 1.875rem; border-bottom: 1px solid var(--color-border); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5rem; border-bottom: 1px solid var(--color-border); padding-bottom: 0.3em; }
.markdown-body h3 { font-size: 1.25rem; }
.markdown-body h4 { font-size: 1rem; }
.markdown-body h5 { font-size: 0.875rem; }
.markdown-body h6 { font-size: 0.85rem; color: var(--color-text-secondary); }

.markdown-body p { margin: 0 0 1em; }

.markdown-body ul,
.markdown-body ol {
  padding-left: 2em;
  margin: 0 0 1em;
}
.markdown-body ul { list-style-type: disc; }
.markdown-body ul ul { list-style-type: circle; }
.markdown-body ul ul ul { list-style-type: square; }
.markdown-body ol { list-style-type: decimal; }
.markdown-body li { margin: 0.25em 0; }
.markdown-body li > ul,
.markdown-body li > ol { margin-top: 0.25em; margin-bottom: 0; }

/* Task list */
.markdown-body input[type="checkbox"] {
  margin-right: 0.5em;
  vertical-align: middle;
}

.markdown-body blockquote {
  margin: 0 0 1em;
  padding: 0.5em 1em;
  border-left: 4px solid var(--color-primary);
  color: var(--color-text-secondary);
  background: var(--color-gray-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
[data-theme="dark"] .markdown-body blockquote { background: var(--color-gray-800); }

.markdown-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.2em 0.4em;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  color: #c7254e;
}
[data-theme="dark"] .markdown-body code { background: var(--color-gray-700); color: #f1978a; }

.markdown-body pre {
  margin: 0 0 1em;
  padding: var(--space-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: 1.6;
}
[data-theme="dark"] .markdown-body pre { background: var(--color-gray-700); }
.markdown-body pre code {
  display: block;
  padding: 0;
  background: var(--color-gray-100);
  color: inherit;
  font-size: var(--text-sm);
  border-radius: 0;
}
[data-theme="dark"] .markdown-body pre code {
  background: var(--color-gray-700);
}

/* highlight.js dark mode override */
[data-theme="dark"] .markdown-body pre .hljs {
  background: var(--color-gray-700);
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1em;
  font-size: var(--text-sm);
}
.markdown-body th,
.markdown-body td {
  padding: 0.5em 1em;
  border: 1px solid var(--color-border);
  text-align: left;
}
.markdown-body th {
  background: var(--color-gray-50);
  font-weight: var(--font-semibold);
}
[data-theme="dark"] .markdown-body th { background: var(--color-gray-800); }

.markdown-body hr {
  margin: 1.5em 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

.markdown-body a {
  color: var(--color-primary);
  text-decoration: underline;
}
.markdown-body a:hover { color: var(--color-primary-dark); }

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.markdown-body del { color: var(--color-text-secondary); }

/* ======================
   CHEAT SHEET
   ====================== */

.cheatsheet-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: var(--space-6);
  padding: var(--space-6) 0;
}

.cheat-category {
  background: #ffffff;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
[data-theme="dark"] .cheat-category {
  background: var(--color-gray-800);
}


.cheat-category h3 {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
  padding-left: var(--space-2);
  border-left: 3px solid #0d9488;
}

.cheat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.cheat-table thead th {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-2);
  border-bottom: 2px solid var(--color-gray-300);
  background: var(--color-gray-50);
  text-align: left;
}

.cheat-table td {
  padding: var(--space-2) var(--space-2);
  vertical-align: middle;
  border-bottom: 1px solid var(--color-gray-200);
  color: var(--color-text);
}
[data-theme="dark"] .cheat-table td { border-bottom-color: var(--color-gray-700); }
[data-theme="dark"] .cheat-table thead th { background: var(--color-gray-700); border-bottom-color: var(--color-gray-600); }
.cheat-table tr:last-child td { border-bottom: none; }

.cheat-table code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: #c7254e;
}
[data-theme="dark"] .cheat-table code { background: var(--color-gray-700); color: #f1978a; }

/* Cheat sheet preview elements */
.cs-pre {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: var(--color-gray-100);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  white-space: pre;
  line-height: 1.5;
  margin: 0;
  color: var(--color-text);
}
[data-theme="dark"] .cs-pre { background: var(--color-gray-700); }

.cs-h1 { font-size: 1.375rem; font-weight: var(--font-bold); margin: 0; color: var(--color-text); }
.cs-h2 { font-size: 1.125rem; font-weight: var(--font-bold); margin: 0; color: var(--color-text); }
.cs-h3 { font-size: 1rem;     font-weight: var(--font-bold); margin: 0; color: var(--color-text); }
.cs-h4 { font-size: 0.875rem; font-weight: var(--font-bold); margin: 0; color: var(--color-text); }

.cs-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: #c7254e;
}
[data-theme="dark"] .cs-code { background: var(--color-gray-700); color: #f1978a; }

.cs-list {
  margin: 0;
  padding-left: 1.5em;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.cs-tasklist { list-style: none; padding-left: 0; }
.cs-tasklist li { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); }

.cs-link { color: var(--color-primary); text-decoration: underline; font-size: var(--text-sm); }

.cs-img-placeholder {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-gray-100);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--color-border);
}
[data-theme="dark"] .cs-img-placeholder { background: var(--color-gray-700); }

.cs-codeblock {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
}
[data-theme="dark"] .cs-codeblock { background: var(--color-gray-700); }
.cs-codeblock code { background: none; padding: 0; color: var(--color-text); font-size: inherit; }

.cs-blockquote {
  margin: 0;
  padding: 0.25em 0.75em;
  border-left: 3px solid var(--color-primary);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.cs-hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 4px 0;
}

.cs-table {
  border-collapse: collapse;
  font-size: var(--text-xs);
}
.cs-table th,
.cs-table td {
  padding: 3px 10px;
  border: 1px solid var(--color-border);
}
.cs-table th {
  background: var(--color-gray-50);
  font-weight: var(--font-semibold);
}
[data-theme="dark"] .cs-table th { background: var(--color-gray-700); }

/* ======================
   RELATED TOOLS
   ====================== */

.related-section {
  width: 100%;
  margin-top: var(--space-6);
}

.related-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-4);
}

.related-grid {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.related-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
  flex: 1;
  min-width: 160px;
}
.related-card:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.related-icon {
  font-size: var(--text-xl);
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.related-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: rgba(255,255,255,0.9);
}

.related-desc {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  margin-top: 2px;
}

/* ======================
   STATUS BAR
   ====================== */

.status-bar {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: var(--space-2) 0;
  position: relative;
  z-index: 5;
}

.status-content {
  display: flex;
  gap: var(--space-6);
  align-items: center;
  flex-wrap: wrap;
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.7);
}

.status-label {
  opacity: 0.6;
}

/* ======================
   TAB CONTENT
   ====================== */

.tab-content { width: 100%; }

/* ======================
   MOBILE
   ====================== */

@media (max-width: 479px) {
  .related-grid { flex-direction: column; }
  .pane-actions { gap: var(--space-1); }
  .pane-actions .btn { padding: 4px var(--space-2); font-size: var(--text-xs); }
  .toolbar-actions { gap: var(--space-1); }
  .md-toolbar-inner { gap: var(--space-2); }
}

/* Cheat Sheet: single column on mobile, scroll inside each card */
@media (max-width: 767px) {
  .cheatsheet-container {
    grid-template-columns: 1fr;
  }
  .cheat-category {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .cheat-table {
    min-width: max-content;
  }
}

/* ── About/Related fix: allow scrolling past tool UI ─────────────────────── */
.main-content { overflow-y: auto; }

/* ── Compact header ─────────────────────────────────────────────────────── */
.header { padding: var(--space-1) 0; }
.logo-link { font-size: var(--text-sm); padding: var(--space-1) var(--space-2); }
.title { font-size: var(--text-sm); }

/* ── Mobile: natural page scroll ────────────────────────────────────────── */
@media (max-width: 767px) {
  body { height: auto; min-height: 100vh; overflow-y: auto; }
  .page-body { overflow: visible; }
  .main-content { overflow: visible !important; padding-bottom: var(--space-8); }
}